Hardware path of tape Libarary on a HP-UX N4000

[Sagar Sirdesai]

Hi
On a remote site we have a C7200 tape Library connected to N4000 Server

I see that the two drives in the Library have hardware paths from two scsi cards.

Please help me understand how the connection is done
serverA> ioscan -knfCtape
Class I H/W Path Driver S/W State H/W Type Description
======================================================================
tape 0 0/0/1/0.3.0 stape CLAIMED DEVICE HP C5683A
/dev/rmt/0m /dev/rmt/0mnb /dev/rmt/c0t3d0BESTn /dev/rmt/c0t3d0DDSb
/dev/rmt/0mb /dev/rmt/c0t3d0BEST /dev/rmt/c0t3d0BESTnb /dev/rmt/c0t3d0DDSn
/dev/rmt/0mn /dev/rmt/c0t3d0BESTb /dev/rmt/c0t3d0DDS /dev/rmt/c0t3d0DDSnb
tape 1 0/12/0/0.1.0 stape CLAIMED DEVICE HP Ultrium 1-SCSI
/dev/rmt/1m /dev/rmt/1mn /dev/rmt/c5t1d0BEST /dev/rmt/c5t1d0BESTn
/dev/rmt/1mb /dev/rmt/1mnb /dev/rmt/c5t1d0BESTb /dev/rmt/c5t1d0BESTnb
tape 2 1/10/0/0.2.0 stape CLAIMED DEVICE HP Ultrium 1-SCSI
/dev/rmt/2m /dev/rmt/2mn /dev/rmt/c7t2d0BEST /dev/rmt/c7t2d0BESTn
/dev/rmt/2mb /dev/rmt/2mnb /dev/rmt/c7t2d0BESTb /dev/rmt/c7t2d0BESTnb

serverA> ioscan -k -H 0/12/0/
H/W Path Class Description
=================================================
0/12/0/0 ext_bus SCSI C87x Fast Wide Differential
0/12/0/0.0 target
0/12/0/0.0.0 autoch HP C7200
0/12/0/0.1 target
0/12/0/0.1.0 tape HP Ultrium 1-SCSI
0/12/0/0.7 target
0/12/0/0.7.0 ctl Initiator
serverA> ioscan -k -H 1/10/0
H/W Path Class Description
=================================================
1/10/0/0 ext_bus SCSI C87x Fast Wide Differential
1/10/0/0.2 target
1/10/0/0.2.0 tape HP Ultrium 1-SCSI
1/10/0/0.7 target
1/10/0/0.7.0 ctl Initiator
mccartney>

[Torsten. · Accepted solution]

The is a card in servers slot 3 that connects drive 1 and the changer, another HBA in slot 8 that connects the other drive.

[Sagar Sirdesai]

Thanks Torsten,

When I see the docs for N4000 Server I see that the slot the Hardware path is 0/4/0 but could find any slot associated with slot 0/12/0.

Surely I see the slot 8 is associated with hardware path 0/10/0

Sagar

[Torsten.]

Try to run

# olrad -q

or

# rad -q

(it depends on OS); this will show the same information.

[Torsten.]

Here you can see a block diagram of the N4000 aka rp7400:

http://docs.hp.com/en/T1335-90012/ch04s01.html

[Sagar Sirdesai]

Thanks Torsten,

A lot fof good good information provided by you

Sagar